Much of the day was consumed by the examination and re-examination of LAPD criminalist Andrea Mazzola. Neufeld confronted her with prior sworn testimony that she had personally initialed every coin envelope for blood stains she collected; she admitted that testimony rested on a mistaken assumption and was wrong, while the envelopes produced bore Dennis Fung's initials. The defense also highlighted the lack of pre-booking photographs, blank property-report quantity boxes, field notes without swatch counts, and coin envelopes not initialed by Mazzola. On redirect, Goldberg argued that item numbers—not initials—were the operative evidence identifiers and emphasized the security and one-at-a-time procedures in the evidence processing room.

• Mazzola impeached with her prior claim that she initialed every coin envelope for blood stains she collected; the envelopes produced bore Fung's initials, not hers
• Mazzola concedes her August 23, 1994 sworn testimony was based on 'assumption' and is incorrect
• Defense establishes documentation failures: no pre-booking photographs, blank quantity boxes, missing dates on blood vial notation
• Defense challenges the Rockingham timeline using KABC videotape and separately uses weight demonstrations to suggest an additional item may have been in the bag
• Judge rejects water-filled tube demonstration to jurors due to insufficient foundation
• Judge allows relevant pages of a defense transcript of a surreptitiously recorded November 22, 1994 meeting to be used to refresh Mazzola's recollection
• Judge Ito denies Neufeld's request to play the audio portion of the demonstration tape after Neufeld argued Goldberg had opened the door
• DNA testimony scheduled: Dr. Cotton (Cellmark), Gary Sims and Renee Montgomery (DOJ); Defense notices formal objection to DNA results without chain-of-custody foundation